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nsfs: fix wrong error code returned for pidns ioctls 

When executing NS_GET_PID_FROM_PIDNS (or similar pidns ioctls), if the
target task cannot be found in the corresponding pid_ns, the error code
should be ESRCH instead of ENOTTY.

This bug was introduced when the extensible ioctl handling was added.
Without proper return, ret would be overwritten by the default case in
the extensible ioctl switch statement.

Fixes: a1d220d9da ("nsfs: iterate through mount namespaces")
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Link: https://patch.msgid.link/20260507112301.1042757-1-chengzhihao1@huawei.com
Reviewed-by: Yang Erkun <yangerkun@huawei.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
master
Zhihao Cheng 2026-05-07 19:23:01 +08:00 committed by Christian Brauner
parent 834e98acb7
commit 725ecd8068
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1 changed files with 1 additions and 1 deletions
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2
fs/nsfs.c
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@ -266,7 +266,7 @@ static long ns_ioctl(struct file *filp, unsigned int ioctl,
else else
tsk = find_task_by_pid_ns(arg, pid_ns); tsk = find_task_by_pid_ns(arg, pid_ns);
if (!tsk) if (!tsk)
break; return ret;
switch (ioctl) { switch (ioctl) {
case NS_GET_PID_FROM_PIDNS: case NS_GET_PID_FROM_PIDNS: